Combination hoist and wire stretcher



V Ap ril 26, 1932. R. MARSCHALL ET AL Q 7 1,355,641

COMBINATION HOIST AND WIRE STRETCHER Filed Nov. '26, 1929 2 Sheets-Sheetl INVENTORS B) Q a g ATTORNEY April 1932- Y R. MARSCHALL ET AL 1,855,641

COMBINATION HOIST AND WIRE STRETCHER Filed Nov. 26, 1929 2 Sheets-Sheet2 lNvENToRs R .Marschall azlcl 0r Q y y ATTORNEY Patented Apr. 26, 1932UNITED STATES RUDOLF MARSCHALI; AND THOMAS GREENSAHD, OF S'IQGKTON,CALIFORNIA COMBI ATl N H l -1' RE ST ET H R Application filed November26; 1929. Serial No. 409,827.

This invention relates to a combination hoisting or pulling and wirestretching implement, one of the objects of the inveniton being toprovide a device of this general 5 character so constructed that anypower or pressure from a few pounds to a ton or more can be easilyexerted by the operator with a minimum of physical eflort.

A further object is to provide an imple- 10 ment of this character whoserange of serv ice and utility is not limited to any particular field,but which besides serving as a means for stretching wires of differentkinds will be of general use in machine shops, garages,

15 warehouses, and like places in lifting loads of different kinds; onthe road in aiding to pull cars out of the ditch or to right them ifupset in the building industry to line up. walls etc., as Well as inother lines of indus- '20 try. The implement is also very useful as alabor saving-"device in connection with the pneumatic rock drills orjack hammers used in road work anddam building construction, since itcan be readily attached to such a hammer so that the bit of the latterwill be automatically lowered into the hole as the latter-is formedwithout any attention on the part of the operator being necessary forsome time-.

A single operator may therefore take care of a battery of such ham-mers,all workingat the same time, when they are attached to their implements.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly effective for the purposeforwhich it is. designed.

These objects we accomplish by means of such structure and relativearrangement of parts as. will fully appear by a perusal of the followingspecification and claims.

In the drawings similar characters of reference indicate correspondingparts in the several views:

Fig. l is a front elevation of our improved implement.

Fig. 2 is a longitudinal section of the same taken substantially on theline 2-2 of Fig. 1.

Fig. 3 is an enlarged longitudinal section of a reversible ratchet orpawl.

Fig. 4 is a frontelevation of the implement as mounted in connectionwith a jack hammer.

Referring now more particularly to the. characters of reference on thedrawings, the to; implement comprises a continuous frame havs ing rigidand spaced side members 1', which 7 at their ends converge to. formrelatively Hall: row portions 2 rounded in cross section which serve ascable guides or cleats to which the;- it! ends of cables may beattached. Intermediate their ends the side members are held spaced bybolts'3 about which tubular spacers t are disposed which also. serve as;cable guides. or rollers. Turnable on a transverse spindle 5 mounted inthe frame centrally between its ends is a cable drum 6- havingsideflanges 7 provided with substantially rectangular notches. 8 all aboutthe same. Also turnahle on the spindle between the drum flanges. and thesides 1 are the arms 9 of a yokewhose cross web 9a clears the drum acertain dis: tance, and is provided with an outwardlypro-. jectingradially disposed socket 10 tov remove ably receive a handle-bar 11 ofany desirable length and which may be a solid member or apiece of pipe.

Transversely alined with the drum flanges are sleeves 12, one of whichis mounted on, the yoke web 9a and the other on a crossbar 113. providedwith the frame a short distance from the drum. Slidable and turnable ineach sleeve is a ratchet shaped pawl 14 to; engage the correspondingflange notches, aspring 15, engaging the pawl yieldably holding the samethus engaged. The pawl is provided; witha hand operating knob 16disposed beyond the outer end of the sleeve, a stem 1'? connectingsaidknob and pawl. The pawl is normally prevented from rotation in thesleeve by a cross pin 18 in the stem slidably engaging op: posed slots19' cut lengthwise in the slQYe from the outer end of the same. This an:rangement causes the pawl to remain facing in any certain direction inwhich it hasbeeri once set, but enables the same to be reversed inposition whenever desired by the operator. This may be done by pullingout on the knob until the pin clears the slots and then turning the knoband pawl through a half revolution before allowing the pin to again ridein the slots. The pawl will then be reversed in position and will exerta holding power on the drum to prevent rotation thereof in the oppositedirection from that formerly permitted; the double functioning of thepawl being possible on account of the rectangular or parallel sidedshape of the notches with which it engages.

A cable 20 is wound on the drum and fixed thereon at one end and extendsthence about either one of the spacers 4: and then beyond the adjacentend of the implement to whatever member it may be desired to attach thecable and which may be either an anchor or the part to be pulled orlifted.

' Opposed pairs of hooks 21 are formed on and project outwardly from theframe members 1 on opposite sides thereof in longitudinally spaced andsymmetrical relation with the. drum spindle, the hooks on the same sidefacing each other. These hooks are provided as additional means forattaching the part to be pulled, or anchor cables or similar members.The frame and the various parts mount- 7 ed thereon being allsymmetrically disposed relative to the drum, and the cable 20 beingcapable of extending in either direction from the drum, it isimmaterialin which direction the device is placed relative to the part to be actedon, as will be evident.

In operation the cable is attached to the part to be pulled and theframe at its opposite end (or the adjacent hooks) is attached to theanchor cable or the like (or vice versa), and the drum is rotated towind the cable thereon by reciprocating the bar 11 through itspermissible or limited arc. Both pawls are set so that while the movableyoke pawl is causing the drum to rotate with the yoke in one direction,the relatively fixed pawl prevents retractive rotation of the drum whenthe yoke is retracted. A great pulling pressure may thus be easilyplaced on the cable 20, as will be obvious.

If it is desired at any time to permit the cable to pay out freely bothpawls are withdrawn from their respective notches and the nobs areturned so that the pins rest on the outer ends of the sleeves, or saidpawls may be reversed in position and allowed to reengage thenotches, aspreviously explained. If it is desired to control the pay out, or slackoff the cable, by means of the handle-bar, the relatively fixed pawl isfirst reversed without disturbing the yoke pawl so as to permit the yoketo turn with the retracting rotation of the drum; and then the fixedpawl is returned to its original position while the yoke pawl 1sreleased to enable the yoke to be turned about the drum to a newposition, when the yoke pawl is again permitted to engage a notch. Thesemovements or manipulations of the pawls are repeated until the cable isperfectly slack or its tension has been reduced to the desired extent.

To more definitely illustrate one important use to which the device maybe put, I have shown the same as mounted in connection with a pneumaticjack hammer or rock drill, as shown in Fig. 4. In this arrangement apair of the devices are used, disposed on opposite sides of and atdownwardly diverging angles to the body 22 of the drill. The cable 20extends downwardly from the drum of each device to. a suitable anchormeans, while a pair of heavy tension springs 23 are con nected at oneend to those hooks 21 which are then disposed toward the upper end ofthe device. The upper ends of these springs are connected to the lowerend of a substantially U-shaped. and rigid bar 24 which at its upperends is provided with hooks 25. These hooks engage the cross handlebar26 of the drill on opposite sides of the body, and the downward movementof these handles controls the feeding of the drill bit 27 of the tool.

In operation the cable is wound onto the drum until the springs havebeen stretched to a considerable extent. The springs then exert aconstant pressure on the handles to cause the bit to be advanced as longas the springs are under tension, or so that said bit may advance atleast several inches without another adjustment of the pulling devicesand a consequent stretching of the springs being necessary. It istherefore possible for one man to control the operation of a battery ofdrills, since he only has to maintain the springs of the various controldevices under tension, which he can easily and quickly do by a fewmovements of the drum rotating handle-bar of each such device.

In case more power is needed it can be obtained by a direct pressure onthe handle. This can be increased to almost any degree by running thecable 20 through a single, double or other multiple block. v

From the foregoing description it will be readily seen that we haveproduced such a device as substantially fulfills the objects of theinvention as set forth herein.

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetails may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claims.

Having thus described our invention what we claim as new and useful anddesire to secure by Letters Patent is:

1. A device for hoisting or like operations including a portable framehaving spaced side members, a drum turnably mounted be tween saidmembers intermediate their ends, a cable secured at one'end' to the drumand adapted to extend thence beyond either end of the frame forconnection to a part to be pulled, means for rotating the drum to causethe cable to be wound thereon, and opposed pairs of hooks projectingoutwardly from the side members of the frame toward both ends thereof;the hooks on each side facing each other.

2. A device for hoisting or like operations including a portable frame,having spaced side members, a drum turnably mounted between said memberscentrally between their ends, a cable secured at one end to the drum andadapted to extend thence'beyond either tures.

RUD OLF MARSCHALL. THOMAS GBEENSAND.

